DEV: Redo DiscourseLogstashLogger to not rely on logstash-logger (#27759)

This reverts commit 92d7d24d0ffbf3e224af19eda2b24df740df056b.

lib/discourse.rb

@@ -4,6 +4,7 @@ require "cache"
 require "open3"
 require "plugin/instance"
 require "version"
+require "git_utils"
 
 module Discourse
   DB_POST_MIGRATE_PATH ||= "db/post_migrate"
@@ -829,42 +830,23 @@ module Discourse
   end
 
   def self.git_version
-    @git_version ||=
-      begin
-        git_cmd = "git rev-parse HEAD"
-        self.try_git(git_cmd, Discourse::VERSION::STRING)
-      end
+    @git_version ||= GitUtils.git_version
   end
 
   def self.git_branch
-    @git_branch ||=
-      self.try_git("git branch --show-current", nil) ||
-        self.try_git("git config user.discourse-version", "unknown")
+    @git_branch ||= GitUtils.git_branch
   end
 
   def self.full_version
-    @full_version ||=
-      begin
-        git_cmd = 'git describe --dirty --match "v[0-9]*" 2> /dev/null'
-        self.try_git(git_cmd, "unknown")
-      end
+    @full_version ||= GitUtils.full_version
   end
 
   def self.last_commit_date
-    @last_commit_date ||=
-      begin
-        git_cmd = 'git log -1 --format="%ct"'
-        seconds = self.try_git(git_cmd, nil)
-        seconds.nil? ? nil : DateTime.strptime(seconds, "%s")
-      end
+    @last_commit_date ||= GitUtils.last_commit_date
   end
 
   def self.try_git(git_cmd, default_value)
-    begin
-      `#{git_cmd}`.strip
-    rescue StandardError
-      default_value
-    end.presence || default_value
+    GitUtils.try_git(git_cmd, default_value)
   end
 
   # Either returns the site_contact_username user or the first admin.